Introduction

What is Internet?

A giant network connects lots of computers all over the world. This network is called the Internet and it allows us to access and share information with people around the world in seconds.

Activity 1
Name a few websites which you use daily.

The World Wide Web(WWW)

The Internet is made up of lots of smaller networks. The World Wide Web (or “the web”) is a network connecting many of our computers, used daily by millions of people.

What are Web Browsers?

Web browsers are computer programs that allow us to view web pages.

Activity 2
Name a few Web Browsers.

Your web browser uses a web address to find the web page you want on the web.
It then accesses the information for the web page using another program, called a web server.

What are Web Pages?

A web page is a file written in computer code by a programmer. Web pages are nearly all written in the same programming language, which is called HTML.
HTML contains the information your computer needs to display a web page on-screen. When a group of web pages is linked together, the group of pages is called a website.

What are Web Servers?

Servers are computers that provide other computers with information.
A web server can either be hardware (a computer) or software (a program) that helps to deliver a web page to your browser.
To access a web page, your web browser has to connect to that page’s web server.
The program running on the web server then finds the web page your browser has requested. It then sends the web page to your computer as HTML code.

What are Web Addresses?

Web addresses, or URLs as they are more commonly known, are a handy way for a web browser to find the web server and HTML file it needs on the web.

URLs are split into different parts, each telling your web browser a different piece of information:

What are Web Pages?

A web page is a file written in computer code by a programmer. Web pages are nearly all written in the same programming language, which is called HTML. HTML contains the information your computer needs to display a web page on-screen.

 

Hyper Text Markup Language (HTML)

HTML is the programming language used by programmers to build websites.
HTML is a great way of creating the basic structure of your web page.
HTML documents are made up of individual HTML elements and their attributes.

Elements are created using opening and closing tags.
Each tag is the name of the element enclosed in angle brackets (< >). The content goes between the tags.
Attributes 
Each HTML tag is an instruction to your web browser, telling it how to show the content on your screen. Tags allow you to add text, images and videos to your web page and divide information into sections, such as lines or paragraphs.

Cascading Style Sheets (CSS)

CSS (Cascading Style Sheets) is a programming language that works with HTML to make your web page look good.
HTML looks very boring on its own, so you use CSS to change the colour, font and position of text and images.
CSS will let you make a piece of text bigger or smaller, change your background colour or position an image in the centre of a page

JavaScript

JavaScript is a very important programming language because it brings web pages to life by making them interactive.
An interactive web page changes when the user does something.
So if you want your user to be able to click a button, or an alert to pop up, you need to use JavaScript. If you use HTML and CSS without JavaScript, you will have a web page that looks great but doesn’t respond to the user

Try It YourSelf.